I have a Dell D800 that the onboard wifi card wouldn't stay connected to the router. I have tried 3 different routers with the same effect. So I purchased a Netgear WG111 USB wifi card. I was able to install the software and talk to the WG111, I am using WPA2/AES on the router. But the card will find the network and the channel but will not connect. I don't get an IP address from the router. My other computers on the router work just fine.
I went the the Netgear site and they told me to go to MS and D/L a security patch. When I did that I got the message the the current patch that I had was newer than the one trying to install so it stopped.
The next solution was to try WPA or WEP but I thought that both of those were less secure.
Any ideas as to what my next steps should be?